Ed Wynn hosted a popular radio show for most of the 1930s, heard in North America on Tuesday nights, sponsored by Texaco gasoline. He was often seen wearing a fireman's helmet, as the "Texaco Fire Chief". During this time, Wynn was offered the part of The Wizard in MGM's adaptation of The Wizard of Oz, but he turned down the role. The part later went to Frank Morgan.
Wynn founded his own short-lived radio network, the Amalgamated Broadcasting System, which lasted only five weeks in 1933.
Wynn always worked "clean," making his shows suitable for the entire family.
Audio Sourced:
Ed Wynn Show -Old Time Radio